--- /dev/null
+#ifndef _STRING_H
+#define _STRING_H 1
+
+#include <stddef.h>
+
+int
+memcmp(const void*, const void*, size_t);
+
+void*
+memcpy(void* __restrict, const void* __restrict, size_t);
+
+void*
+memmove(void*, const void*, size_t);
+
+void*
+memset(void*, int, size_t);
+
+size_t
+strlen(const char* str);
+
+#endif
\ No newline at end of file